The present invention relates to an unburned tobacco controller in true response to smoker's puff process. The unburned tobacco controller comprises a MEMS thermal flow sensor and a microcontroller. With the thermal flow sensor, the controller can duplicate a whole smoker's puff process including puff start, puff stop, single puff duration, single puff volume, single puff interval, total puff volume, total puff duration, total puff interval and total puff number. The microcontroller with several embedded programs so that a tobacco roll can be heated to release nicotine-contained smokes meeting the habits and needs of the smoker and making the smoker feel, sense and experience like a conventional tobacco product.